<?php
class ThumbHandler {
	var $dst_img; // 目标文件
	var $h_src; // 图片资源句柄
	var $h_dst; // 新图句柄
	var $h_mask; // 水印句柄
	var $img_create_quality = 100; // 图片生成质量
	var $img_display_quality = 80; // 图片显示质量,默认为75
	var $img_scale = 0; // 图片缩放比例
	var $src_w = 0; // 原图宽度
	var $src_h = 0; // 原图高度
	var $dst_w = 0; // 新图总宽度
	var $dst_h = 0; // 新图总高度
	var $fill_w; // 填充图形宽
	var $fill_h; // 填充图形高
	var $copy_w; // 拷贝图形宽
	var $copy_h; // 拷贝图形高
	var $src_x = 0; // 原图绘制起始横坐标
	var $src_y = 0; // 原图绘制起始纵坐标
	var $start_x; // 新图绘制起始横坐标
	var $start_y; // 新图绘制起始纵坐标
	var $mask_word; // 水印文字
	var $mask_img; // 水印图片
	var $mask_pos_x = 0; // 水印横坐标
	var $mask_pos_y = 0; // 水印纵坐标
	var $mask_offset_x = 5; // 水印横向偏移
	var $mask_offset_y = 5; // 水印纵向偏移
	var $font_w; // 水印字体宽
	var $font_h; // 水印字体高
	var $mask_w; // 水印宽
	var $mask_h; // 水印高
	var $mask_font_color = "#ffffff"; // 水印文字颜色
	var $mask_font = 2; // 水印字体
	var $font_size; // 尺寸
	var $mask_position = 0; // 水印位置
	var $mask_img_pct = 50; // 图片合并程度,值越大，合并程序越低
	var $mask_txt_pct = 50; // 文字合并程度,值越小，合并程序越低
	var $img_border_size = 0; // 图片边框尺寸
	var $img_border_color; // 图片边框颜色
	var $_flip_x = 0; // 水平翻转次数
	var $_flip_y = 0; // 垂直翻转次数

	var $cut_type = 0; // 剪切类型

	var $img_type; // 文件类型

	// 文件类型定义,并指出了输出图片的函数
	var $all_type = array (
		"jpg" => array (
			"output" => "imagejpeg"
		),
		"gif" => array (
			"output" => "imagegif"
		),
		"png" => array (
			"output" => "imagepng"
		),
		"wbmp" => array (
			"output" => "image2wbmp"
		),
		"jpeg" => array (
			"output" => "imagejpeg"
		)
	);

	/**
	* 构造函数
	*/
	function ThumbHandler() {
		$this->mask_font_color = "#ffffff";
		$this->font = 2;
		$this->font_size = 12;
	}

	/**
	* 取得图片的宽
	*/
	function getImgWidth($src) {
		return imagesx($src);
	}

	/**
	* 取得图片的高
	*/
	function getImgHeight($src) {
		return imagesy($src);
	}

	/**
	* 设置图片生成路径
	*
	* @param string    $src_img   图片生成路径
	*/
	function setSrcImg($src_img, $img_type = null) {
		if (!file_exists($src_img)) {
			die("图片不存在");
		}

		if (!empty ($img_type)) {
			$this->img_type = $img_type;
		} else {
			$this->img_type = $this->_getImgType($src_img);
		}

		$this->_checkValid($this->img_type);

		// file_get_contents函数要求php版本>4.3.0
		$src = '';
		if (function_exists("file_get_contents")) {
			$src = file_get_contents($src_img);
		} else {
			$handle = fopen($src_img, "r");
			while (!feof($handle)) {
				$src .= fgets($fd, 4096);
			}
			fclose($handle);
		}
		if (empty ($src)) {
			die("图片源为空");
		}
		$this->h_src = @ ImageCreateFromString($src);
		$this->src_w = $this->getImgWidth($this->h_src);
		$this->src_h = $this->getImgHeight($this->h_src);
	}

	/**
	* 设置图片生成路径
	*
	* @param string    $dst_img   图片生成路径
	*/
	function setDstImg($dst_img) {
		$arr = explode('/', $dst_img);
		$last = array_pop($arr);
		$path = implode('/', $arr);
		$this->_mkdirs($path);
		$this->dst_img = $dst_img;
	}

	/**
	* 设置图片的显示质量
	*
	* @param string      $n    质量
	*/
	function setImgDisplayQuality($n) {
		$this->img_display_quality = (int) $n;
	}

	/**
	* 设置图片的生成质量
	*
	* @param string      $n    质量
	*/
	function setImgCreateQuality($n) {
		$this->img_create_quality = (int) $n;
	}

	/**
	* 设置文字水印
	*
	* @param string     $word    水印文字
	* @param integer    $font    水印字体
	* @param string     $color   水印字体颜色
	*/
	function setMaskWord($word) {
		$this->mask_word .= $word;
	}

	/**
	* 设置字体颜色
	*
	* @param string     $color    字体颜色
	*/
	function setMaskFontColor($color = "#ffffff") {
		$this->mask_font_color = $color;
	}
	/**
	* 设置水印字体
	*
	* @param string|integer    $font    字体
	*/
	function setMaskFont($font = 2) {
		if (!is_numeric($font) && !file_exists($font)) {
			die("字体文件不存在");
		}
		$this->font = $font;
	}

	/**
	* 设置文字字体大小,仅对truetype字体有效
	*/
	function setMaskFontSize($size = "12") {
		$this->font_size = $size;
	}

	/**
	* 设置图片水印
	*
	* @param string    $img     水印图片源
	*/
	function setMaskImg($img) {
		$this->mask_img = $img;
	}

	/**
	* 设置水印横向偏移
	*
	* @param integer     $x    横向偏移量
	*/
	function setMaskOffsetX($x) {
		$this->mask_offset_x = (int) $x;
	}

	/**
	* 设置水印纵向偏移
	*
	* @param integer     $y    纵向偏移量
	*/
	function setMaskOffsetY($y) {
		$this->mask_offset_y = (int) $y;
	}

	/**
	* 指定水印位置
	*
	* @param integer     $position    位置,1:左上,2:左下,3:右上,0/4:右下
	*/
	function setMaskPosition($position = 0) {
		$this->mask_position = (int) $position;
	}

	/**
	* 设置图片合并程度
	*
	* @param integer     $n    合并程度
	*/
	function setMaskImgPct($n) {
		$this->mask_img_pct = (int) $n;
	}

	/**
	* 设置文字合并程度
	*
	* @param integer     $n    合并程度
	*/
	function setMaskTxtPct($n) {
		$this->mask_txt_pct = (int) $n;
	}

	/**
	* 设置缩略图边框
	*
	* @param (类型)     (参数名)    (描述)
	*/
	function setDstImgBorder($size = 1, $color = "#000000") {
		$this->img_border_size = (int) $size;
		$this->img_border_color = $color;
	}

	/**
	* 水平翻转
	*/
	function flipH() {
		$this->_flip_x++;
	}

	/**
	* 垂直翻转
	*/
	function flipV() {
		$this->_flip_y++;
	}

	/**
	* 设置剪切类型
	*
	* @param (类型)     (参数名)    (描述)
	*/
	function setCutType($type) {
		$this->cut_type = (int) $type;
	}

	/**
	* 设置图片剪切
	*
	* @param integer     $width    矩形剪切
	*/
	function setRectangleCut($width, $height) {
		$this->fill_w = (int) $width;
		$this->fill_h = (int) $height;
	}

	/**
	* 设置源图剪切起始坐标点
	*
	* @param (类型)     (参数名)    (描述)
	*/
	function setSrcCutPosition($x, $y) {
		$this->src_x = (int) $x;
		$this->src_y = (int) $y;
	}

	/**
	* 创建图片,主函数
	* @param integer    $a     当缺少第二个参数时，此参数将用作百分比，
	*                             否则作为宽度值
	* @param integer    $b     图片缩放后的高度
	*/
	function createImg($a, $b = null) {
		$num = func_num_args();
		if (1 == $num) {
			$r = (int) $a;
			if ($r < 1) {
				die("图片缩放比例不得小于1");
			}
			$this->img_scale = $r;
			$this->_setNewImgSize($r);
		}

		if (2 == $num) {
			$w = (int) $a;
			$h = (int) $b;
			if (0 == $w) {
				die("目标宽度不能为0");
			}
			if (0 == $h) {
				die("目标高度不能为0");
			}
			$this->_setNewImgSize($w, $h);
		}

		if ($this->_flip_x % 2 != 0) {
			$this->_flipH($this->h_src);
		}

		if ($this->_flip_y % 2 != 0) {
			$this->_flipV($this->h_src);
		}
		$this->_createMask();
		$this->_output();

		// 释放
		if (imagedestroy($this->h_src) && imagedestroy($this->h_dst)) {
			Return true;
		} else {
			Return false;
		}
	}

	/**
	* 生成水印,调用了生成水印文字和水印图片两个方法
	*/
	function _createMask() {
		if ($this->mask_word) {
			// 获取字体信息
			$this->_setFontInfo();

			if ($this->_isFull()) {
				die("水印文字过大");
			} else {
				$this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
				$white = ImageColorAllocate($this->h_dst, 255, 255, 255);
				imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white); // 填充背景色
				$this->_drawBorder();
				imagecopyresampled($this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h);
				$this->_createMaskWord($this->h_dst);
			}
		}

		if ($this->mask_img) {
			$this->_loadMaskImg(); //加载时，取得宽高

			if ($this->_isFull()) {
				// 将水印生成在原图上再拷
				$this->_createMaskImg($this->h_src);
				$this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
				$white = ImageColorAllocate($this->h_dst, 255, 255, 255);
				imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white); // 填充背景色
				$this->_drawBorder();
				imagecopyresampled($this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->start_y, $this->copy_w, $this->copy_h);
			} else {
				// 创建新图并拷贝
				$this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
				$white = ImageColorAllocate($this->h_dst, 255, 255, 255);
				imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white); // 填充背景色
				$this->_drawBorder();
				imagecopyresampled($this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h);
				$this->_createMaskImg($this->h_dst);
			}
		}

		if (empty ($this->mask_word) && empty ($this->mask_img)) {
			$this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
			$white = ImageColorAllocate($this->h_dst, 255, 255, 255);
			imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $white); // 填充背景色
			$this->_drawBorder();

			imagecopyresampled($this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h);
		}
	}

	/**
	* 画边框
	*/
	function _drawBorder() {
		if (!empty ($this->img_border_size)) {
			$c = $this->_parseColor($this->img_border_color);
			$color = ImageColorAllocate($this->h_src, $c[0], $c[1], $c[2]);
			imagefilledrectangle($this->h_dst, 0, 0, $this->dst_w, $this->dst_h, $color); // 填充背景色
		}
	}

	/**
	* 生成水印文字
	*/
	function _createMaskWord($src) {
		$this->_countMaskPos();
		$this->_checkMaskValid();

		$c = $this->_parseColor($this->mask_font_color);
		$color = imagecolorallocatealpha($src, $c[0], $c[1], $c[2], $this->mask_txt_pct);

		if (is_numeric($this->font)) {
			imagestring($src, $this->font, $this->mask_pos_x, $this->mask_pos_y, $this->mask_word, $color);
		} else {
			imagettftext($src, $this->font_size, 0, $this->mask_pos_x, $this->mask_pos_y, $color, $this->font, $this->mask_word);
		}
	}

	/**
	* 生成水印图
	*/
	function _createMaskImg($src) {
		$this->_countMaskPos();
		$this->_checkMaskValid();
		imagecopymerge($src, $this->h_mask, $this->mask_pos_x, $this->mask_pos_y, 0, 0, $this->mask_w, $this->mask_h, $this->mask_img_pct);

		imagedestroy($this->h_mask);
	}

	/**
	* 加载水印图
	*/
	function _loadMaskImg() {
		$mask_type = $this->_getImgType($this->mask_img);
		$this->_checkValid($mask_type);

		// file_get_contents函数要求php版本>4.3.0
		$src = '';
		if (function_exists("file_get_contents")) {
			$src = file_get_contents($this->mask_img);
		} else {
			$handle = fopen($this->mask_img, "r");
			while (!feof($handle)) {
				$src .= fgets($fd, 4096);
			}
			fclose($handle);
		}
		if (empty ($this->mask_img)) {
			die("水印图片为空");
		}
		$this->h_mask = ImageCreateFromString($src);
		$this->mask_w = $this->getImgWidth($this->h_mask);
		$this->mask_h = $this->getImgHeight($this->h_mask);
	}

	/**
	* 图片输出
	*/
	function _output() {
		$img_type = $this->img_type;
		$func_name = $this->all_type[$img_type]['output'];
		if (function_exists($func_name)) {
			// 判断浏览器,若是IE就不发送头
			/*if (isset ($_SERVER['HTTP_USER_AGENT'])) {
				$ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
				if (!preg_match('/^.*MSIE.*\)$/i', $ua)) {
					header("Content-type:$img_type");
				}
			}*/
            if($img_type=='png'){
                $this->img_display_quality=9;
            }
			$func_name ($this->h_dst, $this->dst_img, $this->img_display_quality);
		} else {
			Return false;
		}
	}

	/**
	* 分析颜色
	*
	* @param string     $color    十六进制颜色
	*/
	function _parseColor($color) {
		$arr = array ();
		for ($ii = 1; $ii < strlen($color); $ii++) {
			$arr[] = hexdec(substr($color, $ii, 2));
			$ii++;
		}

		Return $arr;
	}

	/**
	* 计算出位置坐标
	*/
	function _countMaskPos() {
		if ($this->_isFull()) {
			switch ($this->mask_position) {
				case 1 :
					// 左上
					$this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
					$this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
					break;

				case 2 :
					// 左下
					$this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
					$this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
					break;

				case 3 :
					// 右上
					$this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
					$this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
					break;

				case 4 :
					// 右下
					$this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
					$this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
					break;

				default :
					// 默认将水印放到右下,偏移指定像素
					$this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
					$this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
					break;
			}
		} else {
			switch ($this->mask_position) {
				case 1 :
					// 左上
					$this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
					$this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
					break;

				case 2 :
					// 左下
					$this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
					$this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
					break;

				case 3 :
					// 右上
					$this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
					$this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
					break;

				case 4 :
					// 右下
					$this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
					$this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
					break;

				default :
					// 默认将水印放到右下,偏移指定像素
					$this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
					$this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
					break;
			}
		}
	}

	/**
	* 设置字体信息
	*/
	function _setFontInfo() {
		if (is_numeric($this->font)) {
			$this->font_w = imagefontwidth($this->font);
			$this->font_h = imagefontheight($this->font);

			// 计算水印字体所占宽高
			$word_length = strlen($this->mask_word);
			$this->mask_w = $this->font_w * $word_length;
			$this->mask_h = $this->font_h;
		} else {
			$arr = imagettfbbox($this->font_size, 0, $this->font, $this->mask_word);
			$this->mask_w = abs($arr[0] - $arr[2]);
			$this->mask_h = abs($arr[7] - $arr[1]);
		}
	}

	/**
	* 设置新图尺寸
	*
	* @param integer     $img_w   目标宽度
	* @param integer     $img_h   目标高度
	*/
	function _setNewImgSize($img_w, $img_h = null) {
		$num = func_num_args();
		if (1 == $num) {
			$this->img_scale = $img_w; // 宽度作为比例
			$this->fill_w = round($this->src_w * $this->img_scale / 100) - $this->img_border_size * 2;
			$this->fill_h = round($this->src_h * $this->img_scale / 100) - $this->img_border_size * 2;

			// 源文件起始坐标
			$this->src_x = 0;
			$this->src_y = 0;
			$this->copy_w = $this->src_w;
			$this->copy_h = $this->src_h;

			// 目标尺寸
			$this->dst_w = $this->fill_w + $this->img_border_size * 2;
			$this->dst_h = $this->fill_h + $this->img_border_size * 2;
		}

		if (2 == $num) {
			$fill_w = (int) $img_w - $this->img_border_size * 2;
			$fill_h = (int) $img_h - $this->img_border_size * 2;
			if ($fill_w < 0 || $fill_h < 0) {
				die("图片边框过大，已超过了图片的宽度");
			}
			$rate_w = $this->src_w / $fill_w;
			$rate_h = $this->src_h / $fill_h;

			switch ($this->cut_type) {
				case 0 :
					// 如果原图大于缩略图，产生缩小，否则不缩小
					if ($rate_w < 1 && $rate_h < 1) {
						$this->fill_w = (int) $this->src_w;
						$this->fill_h = (int) $this->src_h;
					} else {
						if ($rate_w >= $rate_h) {
							$this->fill_w = (int) $fill_w;
							$this->fill_h = round($this->src_h / $rate_w);
						} else {
							$this->fill_w = round($this->src_w / $rate_h);
							$this->fill_h = (int) $fill_h;
						}
					}

					$this->src_x = 0;
					$this->src_y = 0;

					$this->copy_w = $this->src_w;
					$this->copy_h = $this->src_h;

					// 目标尺寸
					$this->dst_w = $this->fill_w + $this->img_border_size * 2;
					$this->dst_h = $this->fill_h + $this->img_border_size * 2;
					break;

					// 自动裁切
				case 1 :
                

					// 如果图片是缩小剪切才进行操作
					if ($rate_w >= 1 && $rate_h >= 1) {
					   

						if ($this->src_w >= $this->src_h) {
                            if ($fill_w >= $fill_h) {
                             if ($rate_w >= $rate_h) {
                               
							     //$src_x = round($this->src_w - $this->src_h) / 2;
                                 //$this->setSrcCutPosition($src_x,0);
                                 $src_x = ($this->src_w-$this->src_h*$fill_w/$fill_h)/2;
							     $this->setSrcCutPosition($src_x,0);
							     $this->setRectangleCut($fill_w, $fill_h);
                                 $this->copy_w =$this->src_w-$src_x*2; 
                                 $this->copy_h = $this->src_h;
                                 
                      //  echo $src_x.":".$this->copy_w.":".$this->copy_h;
                      //  exit; 
                                                         
                             }else{
							     $src_y = ($this->src_h-$this->src_w*$fill_h/$fill_w)/2;
                                 
							     $this->setSrcCutPosition(0,$src_y);
							     $this->setRectangleCut($fill_w, $fill_h);
                                 $this->copy_w =  $this->src_w;
                                 $this->copy_h = $this->src_w*$fill_h/$fill_w;
                             }
                            
                            }else{
                                
							     $src_x = ($this->src_w-$this->src_h*$fill_w/$fill_h)/2;
                                 
							     $this->setSrcCutPosition($src_x,0);
							     $this->setRectangleCut($fill_w, $fill_h);
                                 $this->copy_w = $this->src_h*$fill_w/$fill_h;
                                 $this->copy_h = $this->src_h;
                                
                                
                            }
						}
						elseif ($this->src_w < $this->src_h) {
                          
                          if ($fill_w >= $fill_h) {
                          
							     $src_y = ($this->src_h-$this->src_w*$fill_h/$fill_w)/2;
                                 
							     $this->setSrcCutPosition(0,$src_y);
							     $this->setRectangleCut($fill_w, $fill_h);
                                 $this->copy_w = $this->src_w ;
                                 $this->copy_h = $this->src_w*$fill_h/$fill_w;                          

                          
                          }else{
                            
                          
                          if ($rate_w >= $rate_h) {
							$src_x = ($this->src_w-$this->src_h*$fill_w/$fill_h)/2;
							$this->setSrcCutPosition($src_x,0);
							$this->setRectangleCut($fill_w, $fill_h);
                        	$this->copy_w =  $this->src_h*$fill_w/$fill_h;
							$this->copy_h = $this->src_h;
                          }else{
							$src_y = round($this->src_h - $this->src_w) / 2;
							$this->setSrcCutPosition(0,$src_y);
							$this->setRectangleCut($fill_w, $fill_h);
                        	$this->copy_w =  $this->src_w;
							$this->copy_h = round($this->src_w*$fill_w/$fill_h);                                
                          }                            
                            
                            
                          }

						} else {
							$this->setSrcCutPosition(0, 0);
							$this->copy_w = $this->src_w;
							$this->copy_h = $this->src_w;
							$this->setRectangleCut($fill_w, $fill_h);
						}
					} else {
						$this->setSrcCutPosition(0, 0);
						$this->setRectangleCut($this->src_w, $this->src_h);

						$this->copy_w = $this->src_w;
						$this->copy_h = $this->src_h;
					}

          
					// 目标尺寸
					$this->dst_w = $this->fill_w + $this->img_border_size * 2;
					$this->dst_h = $this->fill_h + $this->img_border_size * 2;
  
					break;

					// 手工裁切
				case 2 :
					$this->copy_w = $this->fill_w;
					$this->copy_h = $this->fill_h;

					// 目标尺寸
					$this->dst_w = $this->fill_w + $this->img_border_size * 2;
					$this->dst_h = $this->fill_h + $this->img_border_size * 2;

					break;
				default :
					break;

			}
		}

		// 目标文件起始坐标
		$this->start_x = $this->img_border_size;
		$this->start_y = $this->img_border_size;
	}

	/**
	* 检查水印图是否大于生成后的图片宽高
	*/
	function _isFull() {
		Return ($this->mask_w + $this->mask_offset_x > $this->fill_w || $this->mask_h + $this->mask_offset_y > $this->fill_h) ? true : false;
	}

	/**
	* 检查水印图是否超过原图
	*/
	function _checkMaskValid() {
		if ($this->mask_w + $this->mask_offset_x > $this->src_w || $this->mask_h + $this->mask_offset_y > $this->src_h) {
			die("水印图片尺寸大于原图，请缩小水印图");
		}
	}

	/**
	* 取得图片类型
	*
	* @param string     $file_path    文件路径
	*/
	function _getImgType($file_path) {
		$type_list = array (
			"1" => "gif",
			"2" => "jpg",
			"3" => "png",
			"4" => "swf",
			"5" => "psd",
			"6" => "bmp",
			"15" => "wbmp"
		);
		if (file_exists($file_path)) {
			$img_info = @ getimagesize($file_path);
			if (isset ($type_list[$img_info[2]])) {
				Return $type_list[$img_info[2]];
			}
		} else {
			die("文件不存在,不能取得文件类型!");
		}
	}

	/**
	* 检查图片类型是否合法,调用了array_key_exists函数，此函数要求
	* php版本大于4.1.0
	*
	* @param string     $img_type    文件类型
	*/
	function _checkValid($img_type) {
		if (!array_key_exists($img_type, $this->all_type)) {
			Return false;
		}
	}

	/**
	* 按指定路径生成目录
	*
	* @param string     $path    路径
	*/
	function _mkdirs($path) {
		$adir = explode('/', $path);
		$dirlist = '';
		$rootdir = array_shift($adir);
		if (($rootdir != '.' || $rootdir != '..') && !file_exists($rootdir)) {
			@ mkdir($rootdir);
		}
		foreach ($adir as $key => $val) {
			if ($val != '.' && $val != '..') {
				$dirlist .= "/" . $val;
				$dirpath = $rootdir . $dirlist;
				if (!file_exists($dirpath)) {
					@ mkdir($dirpath);
					@ chmod($dirpath, 0777);
				}
			}
		}
	}

	/**
	* 垂直翻转
	*
	* @param string     $src    图片源
	*/
	function _flipV($src) {
		$src_x = $this->getImgWidth($src);
		$src_y = $this->getImgHeight($src);

		$new_im = imagecreatetruecolor($src_x, $src_y);
		for ($y = 0; $y < $src_y; $y++) {
			imagecopy($new_im, $src, 0, $src_y - $y -1, 0, $y, $src_x, 1);
		}
		$this->h_src = $new_im;
	}

	/**
	* 水平翻转
	*
	* @param string     $src    图片源
	*/
	function _flipH($src) {
		$src_x = $this->getImgWidth($src);
		$src_y = $this->getImgHeight($src);

		$new_im = imagecreatetruecolor($src_x, $src_y);
		for ($x = 0; $x < $src_x; $x++) {
			imagecopy($new_im, $src, $src_x - $x -1, 0, $x, 0, 1, $src_y);
		}
		$this->h_src = $new_im;
	}
}


/*使用说明
$t = new ThumbHandler();

$t->setSrcImg("img/test.jpg");
$t->setDstImg("tmp/new_test.jpg");
$t->setMaskImg("img/test.gif");
$t->setMaskPosition(1);
$t->setMaskImgPct(80);
$t->setDstImgBorder(4,"#dddddd");

指定缩放比例
$t->createImg(300,200);


基本使用
$t->setSrcImg("img/test.jpg");
$t->setMaskWord("test");
$t->setDstImgBorder(10,"#dddddd");

指定缩放比例
$t->createImg(50);

基本使用
$t->setSrcImg("img/test.jpg");
$t->setMaskWord("test");

指定固定宽高
$t->createImg(200,200);

$t->setSrcImg("img/test.jpg");
$t->setDstImg("tmp/new_test.jpg");
$t->setMaskWord("test");

指定固定宽高

$t->setSrcImg("img/test.jpg");

指定字体文件地址
$t->setMaskFont("c:/winnt/fonts/arial.ttf");
$t->setMaskFontSize(20);
$t->setMaskFontColor("#ffff00");
$t->setMaskWord("test3333333");
$t->setDstImgBorder(99,"#dddddd");
$t->createImg(50);


$t->setSrcImg("img/test.jpg");
$t->setMaskOffsetX(55);
$t->setMaskOffsetY(55);
$t->setMaskPosition(1);
//$t->setMaskPosition(2);
//$t->setMaskPosition(3);
//$t->setMaskPosition(4);
$t->setMaskFontColor("#ffff00");
$t->setMaskWord("test");

指定固定宽高
$t->createImg(50);

$t->setSrcImg("img/test.jpg");
$t->setMaskFont("c:/winnt/fonts/simyou.ttf");
$t->setMaskFontSize(20);
$t->setMaskFontColor("#ffffff");
$t->setMaskTxtPct(20);
$t->setDstImgBorder(10,"#dddddd");
$text = "中文";
$str = mb_convert_encoding($text, "UTF-8", "gb2312");
$t->setMaskWord($str);
$t->setMaskWord("test");

指定固定宽高
$t->createImg(50);*/
?>